12111520054535 has 32 divisors (see below), whose sum is σ = 16018913963520. Its totient is φ = 8717465577600.

The previous prime is 12111520054531. The next prime is 12111520054547. The reversal of 12111520054535 is 53545002511121.

It is not a de Polignac number, because 12111520054535 - 2² = 12111520054531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12111520054495 and 12111520054504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111520054531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8511365 + ... + 9831905.

It is an arithmetic number, because the mean of its divisors is an integer number (500591061360).

Almost surely, 2^{12111520054535} is an apocalyptic number.

12111520054535 is a deficient number, since it is larger than the sum of its proper divisors (3907393908985).

12111520054535 is a wasteful number, since it uses less digits than its factorization.

12111520054535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322279.

The product of its (nonzero) digits is 30000, while the sum is 35.

Adding to 12111520054535 its reverse (53545002511121), we get a palindrome (65656522565656).

The spelling of 12111520054535 in words is "twelve trillion, one hundred eleven billion, five hundred twenty million, fifty-four thousand, five hundred thirty-five".